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Retrieving Codes
FAULT CODE DEFINITIONS FOR EEC-IV SYSTEMS (569 - 631)
63 Chapter 4
TEST
CODE CONDITION FAULT CODE DEFINITION
569 O (Trucks ONLY): Auxiliary Canister Purge
(AUX-CANP) circuit failure
571 O EGR circuit failure
572 O EGR circuit failure
578 C A/C pressure sensor circuit
579 C Insufficient A/C pressure change
581 C Power to fan circuit over current
582 O Fan circuit open
583 C Power to fuel pump over current
584 C Power ground circuit open
585 C Power to A/C clutch over current
586 C A/C clutch circuit open
587 C, O Vehicle control relay module
communication failure
617 C Transmission problem (1-2 shift error)
618 C Transmission problem (2-3 shift error)
619 C Transmission problem (3-4 shift error)
621 O Shift Solenoid #1 circuit fault
622 O Shift Solenoid #2 circuit fault
623 C, O Transmission control indicator lamp
circuit failure
624 O, C Electronic Pressure Control solenoid circuit
fault
625 O Electronic Pressure Control solenoid circuit
fault
625 C, O, R Hard fault is present
626 O Coast Clutch solenoid circuit fault
627 O, C Converter Clutch Control solenoid circuit
fault
628 O, C Excessive converter clutch slippage
628 O (Cars ONLY): Lock-up solenoid failure
629 O Converter clutch solenoid circuit fault or
lock-up solenoid circuit fault
631 O Overdrive Transmission Cancel Indicator
Light circuit fault
4
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